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Balance Sheet Components (Other Assets, Net) (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Balance Sheet Related Disclosures [Abstract]
Amortization of licensed technology	$ 336	$ 217

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- Definition

amortization of licensed technology

+ References

No definition available.

+ Details

Name:	pxlw_Amortizationoflicensedtechnology
Namespace Prefix:	pxlw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_BalanceSheetRelatedDisclosuresAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration